Very easy to use. Covers the whole range of functionality needed for event registration.
Very good that one could define own registration-forms for every event.
Only the template isn't full consistent (the same table of details is in one view realized as a HTML-definitionlist in the other view as a table, so I couldn't use the same CSS).
The support is excellent and very fast, both in the forum and with support tickets.
So it's a joy to work with this extension.